Step ladder wheel attachment



FIG. 1 is a perspective view of a step ladder wheel attachment embodying my new design, in place on a ladder represented in the dotted line;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dotted line representation is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a step ladder wheel attachment, as shown and described. 